package com.zut.movie.aspect;

/*自定义切面，实现公共字段自动填充*/


import com.zut.movie.aspect.enumeration.OperationType;
import com.zut.movie.constant.AutoFillConstant;
import com.zut.movie.context.BaseContext;
import lombok.extern.slf4j.Slf4j;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    //切入点
    @Pointcut("execution(* com.zut.movie.mapper.*.*(..)) && @annotation(com.zut.movie.aspect.AutoFill)")
    public  void autoFillPointCut(){}

    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行公共字段填充...");

        //获取当前拦截方法的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();

        //获取当前拦截方法的参数--实体对象
        Object[] args = joinPoint.getArgs();
        if (args==null ||args.length==0){
            return;
        }
        Object entity=args[0];
        //准备赋值数据
        LocalDateTime now = LocalDateTime.now();
        log.info(now.toString());
        Long currentId = BaseContext.getCurrentId();
        //判断操作类型来进行赋值
        if(operationType==OperationType.INSERT){
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //赋值
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }else if (operationType==OperationType.UPDATE){
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //赋值
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
                log.info("封装完成。。。。。。");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}
